Although still considered Jellybean, Google updated Android to version 4.2 today and added several great new features including gesture-based typing, multiple users, and actionable notifications.

Gesture-Based Typing

Much like the much-beloved Swype, Android 4.2's keyboard now offers gesture-based typing where you can draw words with your finger instead of poke at each key individually. They keyboard will also try to anticipate your next word, so you can often avoid typing altogether.

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Multiple Users

One of the biggest complaints users have about tablets is that they're hard to share. You can't switch between multiple users, which makes living in a multi-person household a little difficult if you don't want a ton of different devices. Android 4.2 changes that, allowing you to instantly switch between users right from the lock screen.

Actionable Notifications

Notifications aren't particularly useful in and of themselves, but now Android 4.2 allows you to act on them. For example, you can return a missed call or start an email directly from the notifications shade.

Other New Features

Android 4.2 adds a bunch of other nifty features. Daydream adds interesting information to your lock screen, such as a photo slideshow or news. Photo Spheres allow you to create beyond-panorama images. Shoot all around you and Android's camera app will stitch those images together. Widgets now work a bit better, you can beam photos and videos between devices (if both have NFC), and several accessibility improvements have been made. Check out the official Android page for more information.